//********************************************************
//	Programmazione, M.A.Alberti
//********************************************************
import cs1.Keyboard;

public class Parole
{
	private String valore;
	Parole()
	{
		this.valore = new String();
	}
	Parole(String s)
	{
		this.valore = s;
	}
	public String toString()
	{
		return this.valore;
	}
	
	public String contrai(String s)
	{
		System.out.print("metodo d'istanza: ");
		String new_s = new String();
		for (int i=0; i<this.valore.length(); i=i+2)
			new_s += this.valore.charAt(i);
		return new_s;
	}
		
	public static String contrai(String s)
	{
		String new_s = new String();
		for (int i=0; i<s.length(); i=i+2)
			new_s += s.charAt(i);
		return new_s;
	}
	public static void stampa(String s)
	{
		System.out.println(s);
	}
	
	public String getValore()
	{
		return this.valore;
	}
		
  	public static void main (String [] args)
   	{  
      stampa("input una parola:");
	  String par = Keyboard.readString();
	  stampa(Parole.contrai(par));
	  
	  Parole parola = new Parole("macchina");
	  stampa(Parole.contrai(parola.getValore()));
	  stampa(parola.contrai(parola.getValore()));
	  stampa("\n");
	  stampa(parola.contrai("cane"));
   	}
}